Oxygen is present in a 1-litre flask at a pressure of `7.6 xx 10^(-10)` mmHg at 0°C. Calculate the number of oxygen molecules in the flask.

Explanation

To calculate the number of oxygen molecules in a 1-litre flask at a pressure of \(7.6 \times 10^{-10}\) mmHg at 0°C, we can use the Ideal Gas Law, which is given by the equation:

\[ PV = nRT \]

Where:
- \(P\) = pressure (in atm)
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